Four Real WWI era Photo Postcards of the German Submarine UC7, probably on view in Detroit after the War.

np
nd (c WWI?)
No publisher listed. 3.5 x 5.5, postally unused, light spotting, soiling and waviness else good. "German Submarine UC7" printed on three of the postcards. Two dupes, scene shows the sub docked and industrial area across the water from it. The other two postcards show slightly different scenes of the docked sub, one is a vertical view of the top of the sub and the other is shown horizontally from the starboard side. In both of them, people are lined up at the dock on their way to a passenger steamer, sub is flying an American flag. Sold as a lot only. Scarce.